Reduce copying of local data structures in GeometryMapper and PaintLayerClipper.

third_party/WebKit/Source/core/paint/ClipRect.h

 /*
  * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 25 matching lines @@
 
 class ClipRect {
   USING_FAST_MALLOC(ClipRect);
 
  public:
   ClipRect() : m_hasRadius(false) {}
 
   ClipRect(const LayoutRect& rect) : m_rect(rect), m_hasRadius(false) {}
 
   ClipRect(const FloatClipRect& rect)
-      : m_rect(LayoutRect(rect.rect())), m_hasRadius(rect.hasRadius()) {}
+      : m_rect(rect.rect()), m_hasRadius(rect.hasRadius()) {}
+
+  void setRect(const FloatClipRect& rect) {
+    m_rect = LayoutRect(rect.rect());
+    m_hasRadius = rect.hasRadius();
+  }
 
   const LayoutRect& rect() const { return m_rect; }
 
   bool hasRadius() const { return m_hasRadius; }
   void setHasRadius(bool hasRadius) { m_hasRadius = hasRadius; }
 
   bool operator==(const ClipRect& other) const {
     return rect() == other.rect() && hasRadius() == other.hasRadius();
   }
   bool operator!=(const ClipRect& other) const {
@@ skipping 25 matching lines @@
 
 inline ClipRect intersection(const ClipRect& a, const ClipRect& b) {
   ClipRect c = a;
   c.intersect(b);
   return c;
 }
 
 }  // namespace blink
 
 #endif  // ClipRect_h